the speed of turbine varies with water flow. but frequency of current remains constant. how is this possible?

Answer 1

One way to get a constant frequency current is to fit a system of epicyclic gears to the output shaft of the turbine. Then, even if the turbine speed changes, the final output speed of the shaft will be controlled very precisely by the gears, so that the alternator will turn at a constant speed.
Another way is to first rectify the 'rough' alternating current being produced by the alternator to a Direct current, and then invert it back to an alternating current of a fixed frequency using thyristor controlled inverters.

Answer 2

The speed of the turbine does not vary, the amount of water admitted to the turbine varies to match the load demand of the generator.

When connected to a grid the generator speed is "locked" into the frequency of the grid. The power factor varies depending on how well the turbine control and match the load demand of the generator.

Answer 3

Because in a Hydro plant the amount of water flowing into the turbine is carefully controlled, in response to the alternator load. In this way it rotates at a very constant speed, giving a precise frequency, with little variation.

Answer 4

i haven't seen water turbin
but for wind turbin it is constant, wind flows more and forcefully but speed and frequency are constant
as you know there is electric flow between 2 poles so turning coil needs some energy to be turned in poles
and when wind flowes more atuomatically current which makes eletric flow for turbin ( as detour current) rises so you need more energy for coil to turn . so it actes the same as speed controller i hope i explained it good for you

Answer 5

Frequency shouldn't change at all when connected to the grid, and voltage is well-controlled within a narrow range - only the current would vary based on load.

Answer 6

A generator is used to run many machines at particular frequency. in case you alter the fee of the generator, the frequency variations proportionally besides. All machines linked on your generator replace velocity in this subject. yet maximum device are layout to a definite restoration frequency. So changing frequency of generator isn't an option. changing velocity of generator is used to regulate load of turbines in a grid. in case you upload gasoline on a generator linked to a grid, you will no longer have frequency earnings, somewhat you have greater load on it.

Answer 7

Current is dependent on the size of the orifice. If the size doesn,t change, the current would stay constant.

Answer 8

Frequency of current??

Answer 9

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